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z We reported that Zn x Cd 1− x S (ZnCdS) nanorods could be synthesized via a facile, nontoxic one-pot method. Structural and optical properties of ZnCdS nanorods were characterized by relevant equipments. The x value (Zn/(Zn+Cd)) could be altered across the entire range from 0.21 to 0.89 by changing the ratio of cation precursor contents. The band gap energy ( E g ) could be tuned linearly from 2.68 eV to 3.59 eV with respect to x . We also performed first-principles calculations to prove the experimental variation trend of band gap energy. Results showed that the replacement between Zn and Cd influenced the distribution of the electronic structure, and therefore determined the band gap energy.

Ordered ZnO nanotube arrays with ultrathin wall embedded in anodic aluminum oxide (AAO) template were fabricated by electrodepositing Zn in the templates and then oxidizing them. The formation of Zn nanotubes is attributed to the annular Au electrode and the proper relative rates of deposition and diffusion of Zn 2+ ions. X-ray diffraction and selected-area electron diffraction analyses show that the ZnO nanotubes are polycrystalline. Scanning electron microscopy shows the nanotubes are of large area and have high aspect ratio. Transmission electron microscopy indicates that the ZnO nanotube is straight and has uniform thickness along the length, and the approximate thickness of the tube wall is 5 nm which is very close to the Bohr radius, 2.34 nm.